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312979 (1999 KT4)
Classification: Mars-crossing Asteroid          SPK-ID: 2312979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3669923449947631 4.7798e-08  
a 2.213589244604106 8.7883e-09 au
q 1.401218936871659 1.02e-07 au
i 2.2908915885544 6.7337e-06 deg
node 111.4699229772377 0.00013472 deg
peri 127.6732604186031 0.00013558 deg
M 252.9217670078028 1.792e-05 deg
tp 2459754.301927590373
(2022-Jun-23.80192759)
6.1737e-05 TDB
period 1202.940040502169
3.29
7.1638e-06
1.961e-08
d
yr
n .2992667862728366 1.7822e-09 deg/d
Q 3.025959552336554 1.2013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      7934 days (21.72 yr)  
   first obs. used      1999-03-22  
   last obs. used      2020-12-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:32:05  

Additional Information
 Earth MOID = .391081 au 
 Jupiter MOID = 1.99082 au 
 T_jup = 3.563 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457414.5 (2016-Jan-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3670712749708782 4.7763e-08  
q 1.400860456128885 1.019e-07 au
tp 2457348.706030116976
(2015-Nov-22.20603012)
4.9639e-05 TDB
node 111.4823241465062 0.0001348 deg
peri 127.6273076065114 0.00013566 deg
i 2.290575197721725 6.7316e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      7934 days (21.72 yr)  
   first obs. used      1999-03-22  
   last obs. used      2020-12-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:32:05  

Additional Information
 Jupiter MOID = 1.99082 au 
 T_jup = 3.563 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.281343502446462E-15 -4.863158535573378E-15 1.352577723693445E-12 -4.970263251889564E-14 3.990617159742966E-13 -6.970618078155526E-15
q -4.863158535573378E-15 1.038276663989811E-14 -2.772273773752611E-12 1.058583416046567E-13 -8.139800192518944E-13 1.451125312341631E-14
tp 1.352577723693445E-12 -2.772273773752611E-12 2.464038079586662E-9 -5.593216767263428E-12 7.826164128102525E-10 -6.629483101896188E-12
node -4.970263251889564E-14 1.058583416046567E-13 -5.593216767263428E-12 1.817139820328923E-8 -1.815568726040129E-8 4.479582677011904E-10
peri 3.990617159742966E-13 -8.139800192518944E-13 7.826164128102525E-10 -1.815568726040129E-8 1.840360574986161E-8 -4.495335978174047E-10
i -6.970618078155526E-15 1.451125312341631E-14 -6.629483101896188E-12 4.479582677011904E-10 -4.495335978174047E-10 4.531404117035472E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.74   n/a MPCxxxxx  

312979 (1999 KT4)          Discovered 1999-May-18 by LINEAR at Socorro
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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